Elements to be assembled to form temporary stair

Details Elements to be assembled to form temporary stair Elements to be assembled to form temporary stair

1982-01-20

1984-07-03

Murtagh, John E.

Fire escape, ladder, or scaffold

Kit or separable parts

182 93, 182194, 182228, 52182, E04G 2700, E06C 100, E06C 708

Patent

active

044573987

ABSTRACT:
Elements to be assembled to form in situ a temporary stair, from a pair of planks (1,1') or longitudinally sawn boards, or identical cross-section, intended for serving as stringers and which elements consist of steps (2), identical with one another, the steps being self-locking one by means of another onto and against the planks (1,1'), with the exception of the top step which has to be wedged against these planks (1,1'); each step (2) rests, at each side at the front, on the upper edge of a plank and, at the rear, is brought against the lower edge of the plank by a pair of flats (14,14') terminating in a hook (16) and mounted freely pivotal in the step placed next above.

REFERENCES:
patent: 3713511 (1973-01-01), Hinkle

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